Tickborne Relapsing Fever — United States, 1990–2011
نویسندگان
چکیده
Tickborne relapsing fever (TBRF) is a zoonosis caused by spirochetes of the genus Borrelia and transmitted to humans by ticks of the genus Ornithodoros. TBRF is endemic in the western United States, predominately in mountainous regions. Clinical illness is characterized by recurrent bouts of fever, headache, and malaise. Although TBRF is usually a mild illness, severe sequelae and death can occur. This report summarizes the epidemiology of 504 TBRF cases reported from 12 western states during 1990-2011. Cases occurred most commonly among males and among persons aged 10‒14 and 40‒44 years. Most reported infections occurred among nonresident visitors to areas where TBRF is endemic. Clinicians and public health practitioners need to be familiar with current epidemiology and features of TBRF to adequately diagnose and treat patients and recognize that any TBRF case might indicate an ongoing source of potential exposure that needs to be investigated and eliminated.
منابع مشابه
Toxoplasmosis and Horse Meat, France
3. Assous MV, Wilamowski A. Relapsing fever borreliosis in Eurasia—forgotten, but certainly not gone! Clin Microbiol Infect. 2009;15:407–14. doi:10.1111/j.14690691.2009.02767.x 4. Ras NM, Lascola B, Postic D, Cutler SJ, Rodhain F, Baranton G, et al. Phylogenesis of relapsing fever Borrelia spp. Int J Syst Bacteriol. 1996;46:859–65. doi:10.1099/00207713-46-4-859 5. Scott JC. Typing African relap...
متن کاملBorrelia miyamotoi and Candidatus Neoehrlichia mikurensis in Ixodes ricinus Ticks, Romania
To the Editor: Ixodes spp. ticks are vectors for human and animal pathogens. Ix. ricinus ticks are widely distributed, frequently reported to feed on humans, and the main vector for a large variety of tickborne pathogens (1). The effect of ticks and tickborne diseases on public health, animal health and welfare, and animal production appears to be an increasing global problem, which will lead t...
متن کاملTickborne Relapsing Fever in Southern Iran, 2011–2013
Technical Appendix Table. Characteristics and clinical and laboratory findings for patients having positive results for TBRF by rtPCR, Jask and Rodan Counties, Iran, 2011–2013* Patient no. Sex Age, y Occupation Area, Province Relapses Microscopy (count/10 high power fields) rt-PCR IGS nested PCR 1 M 22 Unknown Jask, Hormozgan Yes Positive† (2.3) Positive Positive 2 M 59 Farmer Jask, Hormozgan Y...
متن کاملTickborne Relapsing Fever, Bitterroot Valley, Montana, USA
In July 2013, a resident of the Bitterroot Valley in western Montana, USA, contracted tickborne relapsing fever caused by an infection with the spirochete Borrelia hermsii. The patient's travel history and activities before onset of illness indicated a possible exposure on his residential property on the eastern side of the valley. An onsite investigation of the potential exposure site found th...
متن کاملTickborne Relapsing Fever in Israel
We evaluated the epidemiology of relapsing fever from 1971 to 2003 in Israel. In civilians, incidence declined from 0.35 to 0.11 cases per 100,000 persons annually; in military personnel it averaged 6.4 cases per 100,000 persons annually. These data imply that the pathogen and vector continue to exist in Israel.
متن کامل